The same remark is also true of the particular conditions requisite for the other spatial elements.

This additional notion is obtained by distinguishing between the notion of 'position' and the notion of convergence to an ideal zero of extension as exhibited by an abstractive set of events.
In order to understand this distinction consider a point of the instantaneous space which we conceive as apparent to us in an almost instantaneous glance.

This point is an event-particle.

It has two aspects.

In one aspect it is there, where it is.